Well-drilling appliance.



I. E. MONROE. WELL DRILLING APPLIANCE.

APPLICATION FILED MAY 28, 1913.

Patented May 12, 1914.

l vgimeooco ISAAC E. MONROE, 0F PLEASANTVILLE, PENNSYLVANIA.

WELL-DRILLING APPLIANCE.

Specification of Letters Patent.

Patented May 12, 1914.

Application filed May 28, 1913. Serial No. 770,468.

To all whom it may concern:

Be it known that I, ISAAC E. MONROE, a citizen of the United States ofAmerica, residing at Pleasantville, in the county of Venango and Stateof-Pennsylvania, have invented new and useful Improvements in\Vcll-Drilling Appliances, of which the following is a specification.

This invention relates to improvements in drilling apparatus and hasparticular application to an appliance for apparatus used in drillingoil, gas, Artesian and other deep wells.

In carrying out the present invention, it is my purpose to provide anappliance for use in deep well drilling apparatus and which willfunction not only as a drilling stem but will be constructed in suchmanner that it may be employed for jarring purposes in the event of thebit, spud or other drilling tool becoming stuck, thus eliminating theemployment of auxiliary tools for jarring.

It is also my purpose to provide an appliance of the class describedwhich will be constructed in such manner as to present, in effect, arigid and integral structure and wherein the component parts thereofwill be movable relatively to one another and held under tension so thata resilient connection between the cable and drilling tools will beestablished and whereby a jarring action may be set up when the drillingtool becomes stuck.

Furthermore, I aim to provide an appliance of the type set forth whichwill embrace the desired features of simplicity, efiiciency, durabilityand strength; one which may be manufactured and installed at a minimumexpense and one which may be readily applied toany type of drillingaparatus without necessitatin elaborate cianges in the structure of suchapparatus.

WVith the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claim.

In the accompanying drawing; Figure'l is a view in side elevation of anappliance constructed in accordance with the presentinvention. Fig. 2 isavertical sectional view through the same, parts being shown inelevation. Fig. 3 is a cross sectional view on the line 33 of Fig. 1.

Referring now to the accompanying drawing in detail, the numeral 1designates :1

rope or cable socket designed to receive one end of the drilling cable,the latter being conn cted to the walking beam or other operatingmechanism in any well known or preferred manner. This socket 1 has thelower end thereof enlarged to form a head 2 and surroundin such head andappropriately fastened t ereto is one extremity of an elongated tube orsleeve 3 depen ing from the head 2 and having threaded into the lowerend thereof a nut 4 formed with a vertical bore or passage 5 alininaxially with the tube 3 and opening into tie latter. Fixed to the end ofthe nut 4 within the tube or sleeve 3 and extending upwardly within saidsleeve or tube is a second relatively short sleeve or tube 6 having theupper open end thereof coaxial with the passage 5 in the nut l. Arrangedcentrally within the tube 3 and passed through the passage 5 in the nutL is a stem 8 having the upper extremity thereof terminating inproximity to the head 2 of the socket 1 and equipped with a cylindricalblock 9, the lower extremity of the stem 8 being equipped with a corehead 10 formed with the usual socket to receive the bit, spud or otherdrilling tool. Surrounding the stem 8 within the sleeves or tubes 8 and6 is a coiled expansion spring 11 having one end thereof abutting theblock 9 and the opposite extremity resting upon the nut 4 within thetube 6.

From the foregoing description taken in connection with the accompanyingdrawing, the construction, mode of operation and manner ofemploying myinvention will be readily apparent. In the ordinary operation of drillina pull on the cable fastened within the soc ct 1 will cause the nut 4 toplace the spring 11 under tension thereby elevatin the stem 8 and thespud or bit con-- nected t iereto in a flexible manner. On the downstroke, when the nut 4 has reached its lowermost point, the weight orinertia of the drilling tools carried by the stem 8 will cause the block9 to compress the spring 11 and so produce a resilient stroke. Theaction of the spring may be regulated by varying the rapidity ofmovement of the device and by lettin out or taking up the cablerelatively to the bottom of the hole being drilled.

Should the spud or hit become stuck, taking up the cable will cause thenut t to compress the spring 11 in order that the upper extremity of thetube 6 Will strike the block 9 and thus produce an upward jar, the forceof the blow thus delivered being determined by the tension of the cableor the speed of the evolutions of the walkin beam or kindred appliance.If it be deslred to effect a downward jar, the cable is let out so as tocause the nut 41: to slide downwardly along the stem 8 until the head 2strikes the block 9.

It will be noted that the inner tube 6 eliminates the possibility of thecoils of the compression spring 11 coming together suddenly and therebymutilating the spring, the tube, owing to its length, striking the block9 before the coils of the compression spring have engaged one another soas to completely close the spring.

While I have herein shown and. describedone preferred form of myinvention by way of illustration, I wish it to be understood that I donot limit or confine myself to the precise details of constructionherein described and delineated, as modification and variation may bemade Within the scope of the claim without departing from the spirit ofthe invention.

I claim:

A drilling appliance comprising a rope socket, a tube depending fromsaid socket, a nut threaded into the lower end of said tube, a secondtube carried by said nut and disposed within the first-mentioned tube, astem passed through said nut and tubes, at

block upon the inner end of said stem, an

expansion spring encircling said stem between said block and nut, and acore head carried by the lower end of said stem.

In testimony whereof I aI'IiX my signature in presence of two witnesses.

ISAAC E. MONROE. Witnesses:

R. L. MonRoE, C. E. HoovLER.

